||Country|Builder|Location|Ship|Class|Notes|
|---|---|---|---|---|---|---|
|23 January|United States|New York Shipbuilding Corporation|Camden, New Jersey|Salt Lake City|Pensacola-class cruiser||
|12 April|France|Chantiers de la Gironde|Gironde|Commandant Teste|Seaplane carrier and tender||
|25 April|United States|New York Navy Yard|Brooklyn, New York|Pensacola|Pensacola-class cruiser||
|22 May|Japan|Uraga Dock|Uraga|Itsukushima|minelayer||
|29 June|Germany|Deschimag Werk A.G|Bremen|Lichtenfels|heavy lift ship|For DDG Hansa|
|3 July|United States|New York Shipbuilding Corporation|Camden, New Jersey|Chester|Northampton-class cruiser||
|6 August|United Kingdom|Harland and Wolff|Belfast, Northern Ireland|Britannic|Ocean liner|For White Star Line|
|5 September|United States|Fore River Shipyard|Quincy, Massachusetts|Northampton|Northampton-class cruiser||
|7 September|United States|Newport News Shipbuilding & Dry Dock Company|Newport News, Virginia|Houston|Northampton-class cruiser||
|Date unknown|Norway|Trondhjems mekaniske Værksted|Trondheim|Barøy|Passenger/cargo ship||
|Date unknown|Germany|Deutsche Werft|Hamburg|Ceuta|Cargo ship|For Oldenburg-Portugiesische Dampfschiffs-Reederei|
|Date unknown|Germany|AG Weser|Bremen|Hercules|Cargo ship|For Dampfschiffahrts-Gesellschaft Neptun|
|Date unknown|United Kingdom|Smiths Dock Co Ltd|Middlesbrough|Vikingen I|Whaler||
|Date unknown|United Kingdom|Smiths Dock Co Ltd|Middlesbrough|Vikingen II|Whaler||
|Date unknown|United Kingdom|Smiths Dock Co Ltd|Middlesbrough|Vikingen III|Whaler||
|Date unknown|Sweden||Björkenäs, Sweden|Yngve|Schooner||

Question: what are the total number of times northampton-class cruiser is listed as the class of the ship?
Answer: 3